For a daily carry option, what do you think of carrying a pair of .380 autos? Here's my thought, if I go with a pair of LCP's (or Kel-Tecs) I would be carrying 14 rounds and surely both wouldn't malfunction on the same date and time. As a plus there would be commonality of ammo, magazines, holsters, parts, etc.
I guess it would work for a pair of j frames also but that would be the biggest size weapon I would look at for daily carry.